Cannot convert lambda expression to type 'string' because it is not a delegate type [duplicate]

I think you are missing using System.Linq; from this system class.

and also add using System.Data.Entity; to the code

In my case, I had to add using System.Data.Entity;

My case it solved i was using

@Html.DropDownList(model => model.TypeId ...)

using

@Html.DropDownListFor(model => model.TypeId ...)

will solve it

CodeHunter